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Hereafter followeth three Particular Treatises, the first of the Sulphur of Gold, and other Metals, then of Stones, and the Extraction of Corall.
REcipe, Purged and fine Gold made in plates, ℥ i. the pou∣der of Pumice stone, ℥ iiii. lay them Stratum Superstratum, and reverberate it with dry wood five dayes and nights toge∣ther, then take the powder and keep it in a glasse. Then melt the Gold again, and make it in plates, and lay it Stratum su∣perstratum as yee did before, and that ye must doe untill the Gold have lost his yellow colour, after take all thy pouders together, and put it in a glasse with distilled Vinegar, and there let it remain untill the Vinegar be coloured yellow, then pour it forth, and put in more, and that thou shalt doe so often, untill the Vinegar be no more coloured, then vapour away the Vinegar, and thou shalt find an inpalpable pouder in the bottome. If thou beest wise, look where thou madest an end, there begin, the like is of other metals. But they are not to be reverberated so long, you shall have of silver a blewish colour, of iron a reddish colour, of copper a darkish colour: There is drawn out of Corall a red tincture. All which things are to be corrected with the spirit of wine, be∣ing often poured thereon, there cannot be a shorter or profitabler way found out for this. Iron plates for one time are of force, but after the first Cimentation they serve no more. His tincture being rightly prepared is used in stead of gold. If it be drawn out of the best steel, it will fixe the Mercurie of Saturn.